KR20210099588A - Laminated panes and windows formed therewith - Google Patents

Abstract

The laminated pane for a window comprises (1) a first sheet having a first thickness and a first coefficient of thermal expansion (CTE), (2) a second sheet of inorganic glass having a second thickness and a second CTE, and (3) a first elastic a polymeric interlayer attached between the first and second sheets comprising a layer of a first polymeric material having a modulus and a layer of a second polymeric material having a second modulus of elasticity, wherein the first CTE is the second CTE greater than, the second thickness ranges from 1 to 0.3 mm down, and the first modulus of elasticity is greater than 20 times the second modulus of elasticity.

Description

Laminated panes and windows formed therewith

This application claims priority to U.S. Provisional Patent Application No. 62/772,733, filed on November 29, 2018, the entire contents of which are incorporated herein by reference.

The present disclosure relates generally to laminated panes having at least one thin glass layer and a polymer interlayer, wherein the interlayer comprises at least two different polymers having widely different moduli of elasticity. The present disclosure also relates to windows using one or more of the laminated panes described herein, such as for increased security in general or for combination of shock and pressure cycling resistance in particular (eg, for use in hurricane windows). it's about

So-called hurricane windows typically use reinforced frame and spacer components as well as internal laminated panes comprising two sheets of glass and a polymer interlayer having a high modulus of elasticity (or high modulus of elasticity under sufficiently rapid deformation). 5 (prior art) shows an example of such a window 200 intended as a hurricane window (or an IGU (insulated glass unit) 200 for such a window).

As can be seen in FIG. 5 , the window 200 includes an outer pane 10 and an inner laminated pane 12 . The outer pane 10 is typically in the form of a single sheet 50 of glass, the surface of the sheet 50 being on the exterior or first surface S1 and second surface S2 (inside) of the window 200 . respond Laminate pane 12 includes a first sheet of glass 20 , a second sheet of glass 70 , and a polymeric interlayer 40 attached between the first and second sheets 20 and 70 . . The polymeric interlayer has a high modulus of elasticity, such as, for example, in the range of about 300 to 1000 MPa, or alternatively such as about 400 to 600 MPa, as measured at 30° C. and at an elongation rate of 10 mm per minute. (or high modulus of elasticity under sufficiently rapid deformation). The polymeric interlayer may have a high modulus of elasticity (or sufficiently high, such as, for example, in the range of about 1 to 300 MPa, or alternatively from about 2 to about 100 MPa, as measured at 30° C. and at an elongation of 10 mm per minute. high modulus of elasticity under rapid deformation). The inward-facing surface of the first sheet 20 and the outward-facing surface of the second seat 70 are the third surface S3 (inside) and the interior or fourth surface S4 (residence) of the window 200 . towards) is applicable. Reinforcing spacers 60 and reinforcing frames (not shown) are also used.

During a hurricane, if a projectile by the wind impacts the surface S1 with sufficient force, the seat 50, the first seat 20 and the second seat 70 may all be broken by the impact, however, the window 200 ), the polymeric interlayer 40 remains intact within the window frame and remains sealed, and the window 50 , the first sheet 20 , and the second sheet 70 even break. Even after being removed, the wind and wind-carried water are prevented from passing through the window 200 and entering the dwelling. In order for the polymer interlayer 40 to withstand these impacts, the first sheet 20 and the second sheet 70 of the laminated pane 12 are thermally strengthened, so that they are thermally tempered, typically from about 24 to about is meant to produce a surface compression in the range of 52 MPa (about 3,500 to about 7,500 psi) (sheet 50 is also generally thermally strengthened).

Typically, unless the first sheet 20 and the second sheet 70 are thermally strengthened, they tend to fracture upon impact and can tear, pierce, or otherwise damage the interlayer 40 . It tends to form large, sharp-edged fragments, preventing the interlayer from maintaining the desired sealing. If the first sheet 20 and the second sheet 70 are subjected to too much surface compression, they can break similar safety glass into small pieces that are prone to fall from the frame, resulting in the grip of the frame on the polymer interlayer 40 . to weaken, post-impact pressure cycling caused by the storm can separate the polymer interlayer 40 from the spacer 60 and the frame (not shown). Accordingly, there is a certain range of thermal enhancement applied to the first sheet 20 and the second sheet 70 . If there is too little, or too much, the window seal will fail on impact alone, or under pressure cycling after impact.

Currently, each sheet of hurricane resistant window 200 requires some thermal strengthening. It would be desirable to provide a hurricane resistant window that has a lower manufacturing process cost, such as avoiding unnecessary thermal enhancement, while preserving or even improving other window properties.

A first aspect of the present disclosure provides at least one laminated pane comprising a first sheet of a first transparent or translucent material, the first sheet having a first thickness, and wherein the first transparent or translucent material is zero. and a first coefficient of thermal expansion (CTE) measured over the range of from to about 300°C. The laminated pane further comprises a second sheet of a second transparent or translucent material, the second sheet having a second thickness, and the second transparent or translucent material having a second CTE. The laminated pane further comprises a polymeric interlayer between the first and second sheets attached between the first and second sheets. The polymeric interlayer includes a first polymeric layer of a first polymeric material having a first modulus of elasticity. The polymeric interlayer further comprises a second polymeric layer of a second polymeric material having a second modulus of elasticity. The first CTE is greater than the second CTE. The second thickness ranges from about 1 to about 0.3 mm. The second transparent or translucent material is an inorganic glass. And, the first elastic modulus is about 20 times greater than the second elastic modulus, alternatively about 100 times greater than the second elastic modulus.

According to another aspect of the present disclosure, the first transparent or translucent material is an organic polymer material. Alternatively, according to another aspect, the first transparent or translucent material is soda lime silicate glass.

According to another aspect, alone or in combination with any of the previous aspects, the second CTE is ^{less than about 50×10 −7} /°C and greater than zero. According to another aspect, alone or in combination with any of the previous aspects, the second CTE is ^{less than about 35 x 10 -7} /°C and greater than zero.

According to another aspect, alone or in combination with any of the previous aspects, the second transparent or translucent material is boro-aluminosilicate glass. Alternatively, according to another aspect, in combination with any of the previous aspects, the second transparent or translucent material is an alkaline earth boro-aluminosilicate glass or an alkali-free boro-aluminosilicate glass.

According to another aspect, alone or in combination with any of the previous aspects, the second thickness ranges from about 0.85 to about 0.4 mm. According to another aspect, alternatively in combination with any of the previous aspects, the second thickness ranges from about 0.8 to about 0.45 mm.

According to another aspect, alone or in combination with any of the previous aspects, the first modulus of elasticity, measured at an elongation of 10 mm per minute and at 30° C., ranges from about 300 to about 1000 MPa. Alternatively, according to another aspect in combination with any of the previous aspects, the first modulus of elasticity, as measured at 30° C. and at an elongation of 10 mm per minute, ranges from about 400 to about 600 MPa. Alternatively, according to another aspect in combination with any of the previous aspects, the first modulus of elasticity, as measured at 30° C. and at an elongation of 10 mm per minute, ranges from about 1 to about 300 MPa, or alternatively , in the range of about 2 to about 100 MPa, as measured at 30° C. and at an elongation of 10 mm per minute.

According to another aspect, alone or in combination with any of the previous aspects, the second modulus of elasticity, when measured at 30° C. and at an elongation of 10 mm per minute, is about one-third of the first modulus, alternatively as less than about 1 in 40, alternatively less than about 1 in 50, or even less than about 1 in 100.

According to another aspect, alone or in combination with any of the previous aspects, the polymeric interlayer further comprises a third polymeric layer of the first polymeric material.

Another aspect of the present disclosure is a window comprising the pane according to any one of the above aspects.

As described in more detail below, these aspects of the present disclosure, alone or in various combinations thereof, may provide a hurricane resistant window or a hurricane resistant pane of a hurricane resistant window, which is thermally strengthened in a second sheet of laminated pane , which allows the use of a low CTE glass sheet as the second sheet of laminated glass without undue distortion of the laminated glass.

Additional features and advantages will be set forth in the detailed description which follows, and in part will be apparent to those skilled in the art from the following detailed description, or of the embodiments described herein, including the following detailed description, claims, as well as the appended drawings. It will be easily recognized by implementing it.

It is to be understood that both the foregoing background and the following detailed description set forth various embodiments and are intended to provide an overview or framework for understanding the nature and nature of the claimed subject matter. The accompanying drawings are included to provide a further understanding of the various embodiments, and are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments described herein, and together with the description serve to explain the principles and operation of the claimed subject matter.

The following detailed description may be better understood when read in conjunction with the following drawings.
1 is a cross-sectional view of a laminated pane in accordance with aspects of the present disclosure.
2 is a cross-sectional view of a window or IGU in accordance with aspects of the present disclosure.
3 and 4 are enlarged cross-sectional views of various aspects of a laminated glass according to the present disclosure.
5 (Prior Art) is an elevated representation of the cross-sectional area of a prior art hurricane-resistant window.

Various aspects of the present disclosure will now be discussed with reference to FIGS. 1-4 , illustrating aspects of laminated panes and windows using such panes, and components, features, or features thereof. The following general description is intended to provide an overview of the claimed apparatus, and various aspects will be more specifically discussed throughout this disclosure with reference to, non-limitingly depicted aspects, which aspects are generally in the context of the present disclosure can be interchanged with each other in

Referring to Figure 1. Disclosed herein is a laminated pane 12 comprising a first sheet 20 of a first transparent or translucent material, the first sheet 20 having a first thickness, and wherein the first transparent or translucent material is from 0 to about It has a first coefficient of thermal expansion (“CTE”) measured over a range of 300°C. The laminated pane 12 further comprises a second sheet 30 of a second transparent or translucent material, the second sheet 30 having a second thickness, and the second transparent or translucent material having a second CTE.

The laminated pane 12 further includes a polymer interlayer 40 attached between the first sheet 20 and the second sheet 30 and between the first sheet 20 and the second sheet 30 . As can be seen in the enlarged inset (or "close-up" cross-sectional view), the polymeric interlayer 40 comprises a first polymeric layer 41 of a first polymeric material, the first polymeric material having a first modulus of elasticity, and a second polymeric layer of a second polymeric material, wherein the second polymeric material has a second modulus of elasticity.

With respect to the laminated pane 12 , the first CTE (of the first sheet 20 ) is greater than the second CTE (of the second sheet 30 ), and the second thickness (thickness of the second sheet 30 ) is in the range of about 1 to about 0.3 mm, the second transparent or translucent material is inorganic glass, and the first modulus of elasticity (modulus of the polymer of the first polymer layer 41) is the second modulus of elasticity (the second polymer layer ( 42) greater than about 20 times, for example, greater than about 100 times greater than the modulus of the polymer of

Laminated pane 12 is one sheet (second sheet of laminated glass 40) that does not require thermal strengthening to pass the impact and pressure cycling tests required to exhibit hurricane resistance. 30))) to construct a hurricane resistant pane for use in hurricane resistant windows. Without wishing to be bound by theory, it is believed that this is due to the fracture pattern of the thin glass sheet (second sheet 30), the pattern being that the spacer 60 and window frame (not shown) undergo impact and pressure cycling. Under the condition of being tested, it does not result in damage to the polymer interlayer 40 or to the sealing of the polymer interlayer 40 . Accordingly, no thermal strengthening is necessary for the second sheet 30 , reducing at least one item of process cost.

In addition, the laminated pane 12 uses (and may use) a low CTE glass sheet as the second sheet 30 of the laminated pane without undue distortion of the laminated pane. Again not wishing to be bound by any particular theory, it is believed that this is due to the presence of the second polymeric layer 42 and the significantly lower modulus of elasticity of the second polymeric layer 42 , which is the first sheet 20 and the second Due to the difference in CTE between the sheets 30 , when cooling from the temperature used to cure the polymer interlayer 40 , the stress generated during lamination can be relieved. The ability to use low CTE glass sheets is important because high quality thin glass is commercially available exclusively (at maximum size) primarily in larger sheets (for cost economy considerations), or even in low CTE glass compositions. do. In addition, the ability to relieve stress resulting from different CTE values allows the production of laminated glass 42 without excessive bow.

According to at least one aspect of the present disclosure, the first transparent or translucent material (the material of the first sheet 20 ) is an organic polymer material. Alternatively, according to another presently preferred aspect, the first transparent or translucent material (the material of the first sheet 20 ) is soda lime silicate glass.

According to another aspect, alone or in combination with any of the foregoing aspects, the second CTE (CTE of the material of the second sheet 30) is ^{less than about 50×10 −7} /°C and greater than zero. Further, in combination with any of the foregoing aspects, according to another aspect, the second CTE is ^{less than about 35 x 10 -7} /°C and greater than zero.

According to another aspect, alone or in combination with any of the foregoing aspects, the second transparent or translucent material (the material of the second sheet 30 ) is boro-alumino silicate glass. Alternatively, according to another aspect, alone or in combination with any of the foregoing aspects, the second transparent or translucent material is an alkaline earth boro-aluminosilicate glass or an alkali-free boro-aluminosilicate glass. Exemplary commercial glass articles include, but are not limited to, ^{Corning ®} EAGLE XG ^® and Lotus ^{™ NXT glass.} In some embodiments, the second sheet may be produced by a float or fusion draw manufacturing process. Soda-lime glass has ^{a CTE of about 90 x 10 -7} /°C. In comparison, Corning EAGLE XG glass has ^{a CTE of about 31.7 x 10 -7} /°C, which is about one-third (“one-third”) of the CTE of soda-lime glass.

According to another aspect of the present disclosure, alone or in combination with any of the foregoing aspects, the second thickness (thickness of the second sheet 30 ) ranges from about 0.85 to about 0.4 mm. Alternatively, according to another aspect in combination with any of the foregoing aspects, the second thickness ranges from about 0.8 to about 0.45 mm. According to another aspect, the first thickness (thickness of the first sheet 20) ranges from about 2 to about 20 mm, or alternatively from about 3 to about 12 mm, or alternatively from about 3 to about 6 mm. can be

According to another aspect, in combination with any of the preceding aspects, the first modulus of elasticity (modulus of the polymer of the first polymer layer 41 ), when measured at 30° C. and at an elongation of 10 mm per minute, is about 300 to about 1000 MPa. Alternatively, according to another embodiment in combination with any of the foregoing aspects, the first modulus of elasticity is in the range of about 400 to about 600 MPa, as measured at 30° C. and at an elongation of 10 mm per minute. According to another embodiment, in combination with any one of the foregoing aspects, the first modulus of elasticity (modulus of the polymer of the first polymer layer 41 ), when measured at an elongation of 10 mm per minute and at 30° C. in the range of about 1 to about 300 MPa. Alternatively, according to another embodiment in combination with any one of the foregoing aspects, the first modulus of elasticity ranges from about 2 to about 100 MPa, as measured at 30° C. and at an elongation of 10 mm per minute. The first polymer may be selected from interlayer polymers typically used in hurricane resistant or intrusion-resistant windows, such as, for example, SentryGlas ^{® available from DuPont or various distributors.}

According to another aspect, in combination with any one of the preceding aspects, the second modulus of elasticity (modulus of the polymer of the second polymer layer 42 ), when measured at 30° C. and at an elongation of 10 mm per minute, is: less than about one-third, alternatively about one-fortieth, alternatively about one-fifth, or alternatively even about one-hundredth of the modulus of elasticity. The second polymer may be selected from a variety of low-elastic-modulus polymers such as, for example, thermoplastic urethanes.

As another aspect of the present disclosure, FIG. 2 shows a cross-section of window 100 with laminated pane 12 described in connection with FIG. 1 .

According to another aspect, as shown in the enlarged cross-sectional view of FIG. 3 , it is common for the polymer interlayer 40 to use multiple layers of a high-elastic modulus polymer, particularly to improve the damage resistance of the polymer interlayer 40 . As such, it may further comprise a third polymeric layer 43 of the first polymeric material. According to another aspect, as shown in the enlarged cross-sectional view of FIG. 4 , the polymeric interlayer 40 may further include a fourth polymeric layer 44 of a second polymeric material, and a fifth polymeric layer of a first polymeric material. where two low-modulus layers (a second and a fourth layer) are provided to provide stress relief and prevent excessive bow. Of course, the window 100 of FIG. 2 may also use any of the polymeric interlayer 40 shown in FIGS. 1, 3, and 4 or other combinations not shown.

In a first embodiment, the laminate was produced according to at least one embodiment of the present application. The laminate had a height of about 989 mm and a width of about 1256 mm. The laminate had a first sheet of soda lime glass about 2.1 mm thick and a second sheet of Corning EAGLE XG glass about 0.7 mm thick. The two glass sheets had a polymer layer composed of multi-layer polyvinyl butyrate (PVB) having a thickness of about 0.81 mm between them. The polymer layer consisted of two outer layers of PVB with a higher modulus of elasticity than the inner core layer of PVB. The two outer layers of PVB both had a thickness of about 0.34 mm, and the inner layer of PVB had a thickness of about 0.13 mm for a total polymer thickness of about 0.81 mm. The higher modulus of elasticity PVB was at least about 20 times greater than the lower modulus of elasticity PVB.

A standard laminate was produced for comparison. The standard laminate had a height of about 989 mm and a width of about 1256 mm. The laminate had a first sheet of soda lime glass having a thickness of about 2.1 mm and a second sheet of Corning EAGLE XG glass having a thickness of about 0.7 mm. The two glass sheets had a polymer layer comprised of standard single layer polyvinyl butyrate (PVB) with a thickness of about 0.76 mm between them. The polymer layer was composed of PVB having an elastic modulus at least about 20 times greater than the lower elastic modulus PVB. Minor differences in thickness between the polymer layers of the two laminates are not expected to produce a difference in the resulting bow.

Both samples were subjected to a bow test according to EN 12150 as follows: the laminate was placed in a vertical position, the longer side by two load bearing blocks at quarter points. ) was supported. The strain was then measured as the maximum distance along the diagonal between a straight metal ruler or stretched wire and the concave surface of the glass. Then, the value of the bow, in mm, is expressed as the absolute value of the deformation.

The standard laminate produced a deflection of about 4.52 mm (measured max-min across the diagonal). A laminate according to an embodiment of the present application produced a deflection of about 2.78 mm (measured max-min across the diagonal). This translates into a reduction in warpage of about 38% for the current laminate.

In another embodiment, a laminate was produced according to a further embodiment of the present application. The laminate had a height of about 3 feet and a width of about 5 feet. The laminate had a first sheet of soda lime glass having a thickness of about 6 mm and a second sheet of Corning EAGLE XG glass having a thickness of about 0.7 mm. The two glass sheets had a polymer layer composed of multi-layer polyvinyl butyrate (PVB) with a thickness of about 0.81 mm between them. The polymer layer consisted of two outer layers of PVB with a higher modulus of elasticity than the inner core layer of PVB. The two outer layers of PVB both had a thickness of about 0.34 mm, and the inner layer of PVB had a thickness of about 0.13 mm for a total polymer thickness of about 0.81 mm. The higher modulus of elasticity PVB was at least about 20 times greater than the lower modulus of elasticity PVB.

A standard laminate was produced for comparison. The standard laminate had a height of about 3 feet and a width of about 5 feet. The first laminate had a first sheet of soda lime glass having a thickness of about 6 mm and a second sheet of Corning EAGLE XG glass having a thickness of about 0.7 mm. The two glass sheets had a polymer layer composed of standard single layer polyvinyl butyrate (PVB) with a thickness of about 0.76 mm between them. The polymer layer was composed of PVB having an elastic modulus at least about 20 times greater than the lower elastic modulus PVB. Note that minor differences in thickness between the polymer layers of the two laminates are not expected to produce a difference in the resulting warpage.

Both samples were tested for bending according to EN 12150 as follows: the laminate was placed in a vertical position and supported on the longer side by two load-bearing blocks at quarter points. The strain was then measured as the maximum distance along the diagonal between a straight metal ruler or stretched wire and the concave surface of the glass. The value for the bow is then expressed in mm as the absolute value of the strain.

The standard laminate produced a deflection of about 5.01 mm (measured max-min across the diagonal). A laminate according to an embodiment of the present application produced a deflection of about 2.88 mm (measured max-min across the diagonal). This translates into a reduction in warpage of about 43% for the current laminate.

It will be appreciated that various disclosed embodiments may include particular features, elements, or steps described in connection with that particular embodiment. It will also be appreciated that a particular feature, element, or step, although described with respect to one particular embodiment, may be interchanged or combined with an alternative embodiment in various non-illustrated combinations or substitutions.

Also, it should be understood that, as used herein, the singular means “at least one” and should not be limited to “only one” unless expressly indicated to the contrary. Thus, for example, reference to “an element” includes one such “component” or embodiments having two or more such “component” unless the context dictates otherwise. Similarly, "plurality" or "arrangement" is intended to refer to two or more, such that "array of elements" or "plurality of elements" refers to two or more such elements.

Ranges may be expressed herein from “about” one particular value, and/or to “about” another particular value. When such ranges are expressed, embodiments include from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another aspect. It will be further understood that each endpoint of a range is meaningful both with respect to and independently of the other endpoint.

All numerical values indicated herein, whether stated or not, should be construed as including "about," unless expressly stated otherwise. However, it is further understood that each numerical value recited is also considered precisely, whether or not it is expressed as "about" that value. Thus, both "a dimension less than 100 nm" and "a dimension less than about 100 nm" include embodiments of "a dimension less than about 100 nm" as well as "a dimension less than 100 nm".

Unless otherwise noted, no method described herein is intended to be construed as requiring its steps to be performed in a particular order. Accordingly, method claims are not intended to be construed as presumed to be in any particular order unless specifically recited in the claims or detailed description that the steps are not in fact recited in the process claims, or that the steps are limited to that particular order. .

Where various features, elements or steps of a particular embodiment are disclosed using the transition phrase “comprising”, alternative embodiments including those that may be described using the transition phrase “consisting of” or “consisting essentially of” are implied. will be understood Thus, for example, an implicit optional implementation for a device comprising A+B+C is an embodiment for a device consisting of A+B+C and an embodiment for a device consisting essentially of A+B+C. include embodiments of

It will be apparent to those skilled in the art that various modifications and changes can be made to the present disclosure without departing from the spirit and scope thereof. Since modifications, combinations, sub-combinations and variations of the disclosed embodiments incorporating the spirit and material of the present disclosure will occur to those skilled in the art, the present disclosure is intended to cover all within the scope of the appended claims and their equivalents. should be interpreted as

Claims (16)

As laminated glass:
a first sheet of a first transparent or translucent material, the first sheet having a first thickness, and wherein the first transparent or translucent material has a first coefficient of thermal expansion (CTE ₁ ) measured over a range of 0 to about 300 °C. have;
a second sheet of a second transparent or translucent material, the second sheet having a second thickness, the second transparent or translucent material having a second coefficient of thermal expansion (CTE ₂ ); and
a polymer interlayer between the first sheet and the second sheet attached between the first sheet and the second sheet, the polymer interlayer comprising:
a first polymeric layer of a first polymeric material having a first modulus of elasticity, and
a second polymeric layer of a second polymeric material having a second modulus of elasticity;
wherein CTE ₁ is _{greater than CTE 2} , the second thickness ranges from about 1 to about 0.3 mm, the second transparent or translucent material is inorganic glass, and the first modulus of elasticity is about 20 times greater than the second modulus of elasticity. laminated glass. The method according to claim 1,
wherein the first transparent or translucent material is an organic polymer material. The method according to claim 1,
wherein the first transparent or translucent material is soda lime silicate glass. The method according to any one of the preceding claims,
wherein said second CTE is ^{less than about 50 x 10 -7} /°C and greater than zero. The method according to any one of the preceding claims,
wherein said second CTE is ^{less than about 35 x 10 -7} /°C and greater than zero. The method according to any one of the preceding claims,
wherein the second transparent or translucent material is boro-aluminosilicate glass. The method according to any one of the preceding claims,
wherein the second transparent or translucent material is alkaline earth boro-aluminosilicate glass or alkali-free boro-aluminosilicate glass. The method according to any one of the preceding claims,
and the second thickness ranges from about 0.85 to about 0.4 mm. The method according to any one of the preceding claims,
and the second thickness ranges from about 0.8 to about 0.45 mm. The method according to any one of the preceding claims,
and wherein the first modulus of elasticity is in the range of about 300 to about 1000 MPa, as measured at 30° C. and at an elongation rate of 10 mm per minute. The method according to any one of the preceding claims,
wherein the first modulus of elasticity is in the range of about 400 to about 600 MPa, as measured at 30° C. and at an elongation of 10 mm per minute. The method according to any one of the preceding claims,
and wherein the second modulus of elasticity is less than or equal to 1/3 of the first modulus of elasticity, measured at an elongation of 10 mm per minute and at 30°C. The method according to any one of the preceding claims,
and the second modulus of elasticity, measured at an elongation of 10 mm per minute and at 30° C., is less than or equal to 1/40 of the first modulus of elasticity. The method according to any one of the preceding claims,
wherein the second modulus of elasticity is less than or equal to about one hundredth of the first modulus of elasticity, measured at an elongation of 10 mm per minute and at 30°C. The method according to any one of the preceding claims,
wherein the polymeric interlayer further comprises a third polymeric layer of a first polymeric material. A window comprising a pane according to any one of the preceding claims.

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